Appears to be missing. Here's a cached version: <a href="http://webcache.googleusercontent.com/search?sclient=psy-ab&hl=en&safe=off&biw=1366&bih=603&source=hp&q=cache%3Ahttp%3A%2F%2Fblog.parse.com%2F2011%2F10%2F03%2Fparse-is-now-compatible-with-arc%2F&pbx=1&oq=cache%3Ahttp%3A%2F%2Fblog.parse.com%2F2011%2F10%2F03%2Fparse-is-now-compatible-with-arc%2F&aq=f&aqi=&aql=&gs_sm=e&gs_upl=85742l86819l0l87187l6l4l0l0l0l3l285l935l0.1.3l4l0" rel="nofollow">http://webcache.googleusercontent.com/search?sclient=psy-ab&...</a>
I hate following links to blog posts about some software that don't quickly summarise what it does. I do some iOS dev, but I haven't heard of parse - if it's awesome you could have interested me, but instead I just read an insiders-only blog post and shrugged. Shame!